LEVELS AND WATER SOLUBLE ORGANIC CARBON OF ATMOSPHERIC NANOPARTICLES IN A LOCATION OF HA NOI, VIET NAM

Atmospheric nanoparticles (NPs or PM0.1) were investigated at a site inside the campus of Ha Noi University of Science and Technology (HUST) in Ha Noi, Viet Nam. The sampling was conducted during a rainy season (August, 2015) and a dry season (October to December, 2015). Mass was weighed by an electronic micro-balance, Sartorius ME2, 10-6 g. Number concentrations were measured by an electrical mobility spectrometer (NanoScan, SMPS TSI Model 3910). Water soluble organic carbon (WSOC) was analyzed by a total carbon analyzer (TOC-VCHP, Shimazu). The correlations between WSOC and other components were studied to primarily identify the sources of atmospheric nanoparticles. Secondary organic carbon (SOA) was estimated using elemental carbon (EC) – tracer method. Selected characteristics of nanoparticles including mass concentrations, number concentrations, and WSOC were determined.

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Secondary formation of water-soluble organic acids andα-dicarbonyls and their contributions to total carbon and water-soluble organic carbon: Photochemical aging of organic aerosols in the Arctic spring

Journal of Geophysical Research Atmospheres ◽

10.1029/2010jd014299 ◽

2010 ◽

Vol 115 (D21) ◽

Cited By ~ 86

Author(s):

Kimitaka Kawamura ◽

Hideki Kasukabe ◽

Leonard A. Barrie

Keyword(s):

Organic Carbon ◽

Organic Acids ◽

Organic Aerosols ◽

Water Soluble ◽

Total Carbon ◽

The Arctic ◽

Secondary Formation ◽

Water Soluble Organic Carbon ◽

Soluble Organic Carbon ◽

Photochemical Aging

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Variability of organic and elemental carbon, water soluble organic carbon, and isotopes in Hong Kong

Atmospheric Chemistry and Physics ◽

10.5194/acp-6-4569-2006 ◽

2006 ◽

Vol 6 (12) ◽

pp. 4569-4576 ◽

Cited By ~ 96

Author(s):

K. F. Ho ◽

S. C. Lee ◽

J. J. Cao ◽

Y. S. Li ◽

J. C. Chow ◽

...

Keyword(s):

Hong Kong ◽

Organic Carbon ◽

Elemental Carbon ◽

Motor Vehicle ◽

Regional Scale ◽

Water Soluble ◽

Total Carbon ◽

Carbonaceous Aerosol ◽

Water Soluble Organic Carbon ◽

Soluble Organic Carbon

Abstract. To determine the levels and variations of carbonaceous aerosol in Hong Kong, PM2.5 and PM10 samples were collected by high volume (Hi-vol) samplers at three monitoring stations (representing middle-scale roadside, urban-, and regional-scale environments) during winter (November 2000 to February 2001) and summer (June 2001 to August 2001) periods. The highest concentrations of organic carbon (OC), elemental carbon (EC), and water-soluble organic carbon (WSOC) were found at the middle-scale roadside site with the lowest at the regional-scale site. The percentages of WSOC in total carbon at these sites were inversely correlated with their concentrations (i.e., the highest percentages of WSOC were observed at the regional-scale site). A high WSOC fraction may be associated with aged aerosol because of the secondary formation by photochemical oxidation of organic precursors of anthropogenic pollutants during transport. The annual average of isotope abundances (δ13C) of OC and EC were –26.9±0.5‰ and –25.6±0.1‰, respectively. There were no notable differences for seasonal distributions of carbon isotopic composition, consistent with motor vehicle emissions being the main source contributors of carbonaceous aerosol in Hong Kong. OC 13C abundances at the regional-scale site were higher than those at the middle-scale roadside and urban sites, consistent with secondary organic aerosols of biogenic origin.

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Variability of organic and elemental carbon, water soluble organic carbon, and isotopes in Hong Kong

Atmospheric Chemistry and Physics Discussions ◽

10.5194/acpd-6-4579-2006 ◽

2006 ◽

Vol 6 (3) ◽

pp. 4579-4600 ◽

Cited By ~ 8

Author(s):

K. F. Ho ◽

S. C. Lee ◽

J. J. Cao ◽

Y. S. Li ◽

J. C. Chow ◽

...

Keyword(s):

Hong Kong ◽

Organic Carbon ◽

Elemental Carbon ◽

Motor Vehicle ◽

Regional Scale ◽

Water Soluble ◽

Total Carbon ◽

Carbonaceous Aerosol ◽

Water Soluble Organic Carbon ◽

Soluble Organic Carbon

Abstract. To determine the levels and variations of carbonaceous aerosol in Hong Kong, PM2.5 and PM10 samples were collected by high volume (Hi-vol) samplers at three monitoring stations (representing middle-scale roadside, urban-, and regional-scale environments) during winter (November 2000 to February 2001) and summer (June 2001 to August 2001) periods. The highest concentrations of organic carbon (OC), elemental carbon (EC), and water-soluble organic carbon (WSOC) were found at the middle-scale roadside site with the lowest at the regional-scale site. The percentages of WSOC in total carbon at these sites were inversely correlated with their concentrations (i.e., the highest percentages of WSOC were observed at the regional-scale site). A high WSOC fraction may be associated with aged aerosol because of the secondary formation by photochemical oxidation of organic precursors of anthropogenic pollutants during transport. The annual average of isotope abundances (δ13C) of OC and EC were –26.9±0.5 and –25.6±0.1, respectively. There were no notable differences for seasonal distributions of carbon isotopic composition, consistent with motor vehicle emissions being the main source contributors of carbonaceous aerosol in Hong Kong. OC 13C abundances at the regional-scale site were higher than those at the middle-scale roadside and urban sites, consistent with secondary organic aerosols of biogenic origin.

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